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7 papers · 1 filter
Reply to "Comment on Universal Decoherence in Solids"
Eugene M. Chudnovsky
The Comment of Openov (PRL 93, 158901 (2004)) on my Physical Review Letter (PRL 92, 120405 (2004)) does not affect the universality of the decoherence mechanism described in the Le…
Parageometric outer automorphisms of free groups
Michael Handel, Lee Mosher
We study those fully irreducible outer automorphisms phi of a finite rank free group F_r which are ``parageometric'', meaning that the attracting fixed point of phi in the boundary…
The expansion factors of an outer automorphism and its inverse
Michael Handel, Lee Mosher
A fully irreducible outer automorphism phi of the free group F_n of rank n has an expansion factor which often differs from the expansion factor of the inverse of phi. Nevertheless…
Harmonicity of quasiconformal measures and Poisson boundaries of hyperbolic spaces
Chris Connell, Roman Muchnik
We consider a group G of isometries acting on a (not necessarily geodesic) delta-hyperbolic space X and possessing a radial limit set of full measure within its limit set. For any…
Phonon superradiance and phonon laser effect in nanomagnets
E. M. Chudnovsky, D. A. Garanin
We show that the theory of spin-phonon processes in paramagnetic solids must take into account the coherent generation of phonons by the magnetic centers. This effect should drasti…
Distortion Elements in Group actions on surfaces
John Franks, Michael Handel
If $\G$ is a finitely generated group with generators then an infinite order element $f \in \G$ is a {\em distortion element} of $\G$ provided $\displaystyle{\lim…